Why is winter colder than summer?

1 Answer
Nov 12, 2015

In winter the earth's axis is tilted away from the sun causing the sun's rays to be spread over a more oblique area than in the summer.


As (hopefully) can be seen in the diagram below, a fixed width band of the sun's rays shining on equidistant points from the equator is spread over a much wider area in the hemisphere where the axis is pointing away from the sun.
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Note that if you live in the Northern hemisphere, you are actually closer to the sun in the winter than in the summer.